[RESOLVED] why does not custom validator work for a textbox when I don t enter any text

Hi,
I have a textbox and button and other stuff in updatePanel, I place a customvalidator with client and server functions.

When I enter some text in the textbox my validation checks if the text entered has a length more than 3 characters, if not validation fails and error is displayed.

Every thing works fine if I enter 1 or 2 characters meaning: I get error message, and if I put 3 characters or more the page is valid and postabck occurs.

The problem is:
If I enter no text in the textbox, no error message is displayed, actually the client and server validation functions don t even execute. Any idea why?

Please note that I don t want to use RequiredFieldValidator to work around the pb. I want to be able to use the same customValidator to display my error message if no text is entered in the textbox.

Thank you very much.

That, quite simply, is the way the custom validator works: it will only validate fields that have a value. Think of it this way:
- The required field validator ensures there is a value provided, and
- The custom field validator is used to provide a bespoke validation solution.
Why increase the complexity of the CFV by duplicating the RFV's functionality?

Why don't you want to use a required field validator?

An alternative is binding the custom field validator to a secondary textbox that is hidden via CSS (display:none), whilst still validating against the original textbox.

thanks axion_sa for trying to help me but customvalidator has the property: ValidateEmptyText that fixes the problem. I got the answer somewhere else, and wanted to share it with u.
Thanks again for all the explanation, I appreciate.